If your Mac starts up to a blank screen - Apple Support
MacBook won't turn on? 12 ways to fix it
What should I do if my MacBook Pro won't turn on? - Quora
My MacBook Air isn't turning on and it's not charging at all. Not sure what could have happened. Never dropped it or got it wet. Was working fine yesterday until it died,
MacBook won't turn on? 12 ways to fix it
My MacBook Air isn't working - Apple Community
How to Fix a Frozen Mac or MacBook: 8 Troubleshooting Tips
If you forgot your Mac login password - Apple Support